Synthesis, characterization, and application of CoFe₂O₄@amino‐2‐naphthol‐4‐sulfonic acid as a novel and reusable catalyst for the synthesis of spirochromene derivatives

Abstract

In the present work, 1-amino-2-naphthol-4-sulfonic acid immobilized on functionalized CoFe 2 O 4 nanoparticles was successfully synthesized as a new, efficient, and recoverable catalyst and tested for the synthesis of spirochromene derivatives by a simple, green, and inexpensive procedure. This magnetically heterogeneous nanocatalyst was characterized by various techniques such as Fourier transform infrared (FT-IR), thermal gravimetric analysis (TGA)/derivative thermogravimetric (DTG), X-ray diffraction (XRD), MAP, transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), vibrating sample magnetometer (VSM), Brunauer-Emmett-Teller (BET), and scanning electron microscopy (SEM) analyses. The novel synthesized nanocatalyst can be easily separated and can also be reused several times without appreciable loss in its catalytic activity. Furthermore, in comparison with previous reports, this nanocatalyst showed high thermal stability and acidic properties. K E Y W O R D S 1-Amino-2-naphthol-4-sulfonic acid, ANSA-CoFe 2 O 4 , magnetic nanocatalyst, recoverable nanocatalyst, spirochromene derivatives

The preparation of polyvinyl imidazole-functionalized magnetic biochar decorated by silver nanoparticles as an efficient catalyst for the synthesis of spiro-2-Amino-4H-pyran compounds

“…The relevant synthesis in this research has already been reported in the literature. All steps have been carried out according to organic synthesis principles, such as Michael addition, water removal, and tautomerization 71 , 72 .…”

Synthesis, Characterization, Dft, and Biological Assay of New Xanthate Complexes With Nitrogen Bases

“…7). This weight loss is attributed to the thermal decomposition of the xanthate complex [Ni(2-PhOEtXant)2(en)] into [NiS2], resulting in the formation of iron sulfide and volatile compounds as end products (Cordova et al, 2021), (Faroughi Niya et al, 2021) and (Palaty et al, 2010). In…”

Synthesis and application of CoFe₂O₄@THAM@PHG‐SO₃H nanoparticles as a new and highly recyclable nanocatalyst in the one‐pot multicomponent synthesis of 3,4‐dihydropyranochromenes and chromeno[3,4‐b]quinoline‐6‐ones

“…In this study, we continue the development of synthesizing MNPs as catalysts for multicomponent reactions (MCRs) with a focus on their environmentally‐friendly properties 45–47 . Particularly, we report on the arrangement of CoFe₂O₄@THAM@PHG‐SO₃H and explore its adequacy as a reusable nanocatalyst within the amalgamation of 3,4‐dihydropyranochromene through a three‐component response including aromatic aldehydes ( 1 ), 4‐hydroxycoumarin ( 2 ), and malononitrile ( 3 ).…”